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Letters Patent No. 93,629, dated August 10, 1869.

IMPROVED PROCESS or rn'eeannve 'coKE- FROM COLORADO AND OTHER GOALS.

The Schedule referred vto in these Letters Patent and making part of the same.

To whom it may concern:

Be it known that I, WILLIAM J. LYND, of Golden City, in the county of J efi'erson, and Territory of Colo'rado, have invented or discovered a new and useful Process of Coking the Different Species of Goals found in Colorado Territory, and in other parts of the United States of America, and at present mined in J efi'erson county and in Boulder county of said Colorado Territory, said coals being called by some glance, by others,

, dry bituminous, and by others, lignite, and I do herebydeclare the following to be a full and exact description of the same.

The coal, to prevent slaking and crumbling by the action of the air, is placed, as soon as possible after it is mined, in a coking-kiln or oven surmounted bya chimney, so arranged as to'be hermetically closed or made air-tight, when desired, at the base,-w here it (the chimney) touches or rises from the kiln or oven. That oven is best which is of the largest practicable size, because the greater the quantity of this coal in ignition together, the better will be the carbonization. A kiln or oven without a chimney will answer, but it should be provided with a covering of suitable material, to

close air-tight the aperture allowed for the escape of the aeriform or gaseous products; The covering is better when quite thick, say from three to nine inches.

It can be made air-tight by the application of any cement, such as mortar, clay, or wet moulders sand.

Instead of a kiln or oven, retorts may be used; but the retorts should be provided with doors or valves, to perfectly close the retorts, when the gases or impurities have been expelled, so as to exclude the air, and

metallurgical operations coals. But the process is hastened, assisted, and improved by the introduction of oarburetted-hydrogen gas or vapor from oil, coal-tar, or other hydrocarbons. The gas or vapor should be introduced by one or several pipes, so that the gas or vapor may reach all the coals, when the closing is nearly completed. 7

Instead of the gas or vapor, the hydrocarbon-fluid may be introduced, generating, by contact with the coals, the gas or vapor.

If pipes be used for the gas or fluid, as above specified, they should be closed tightly at the places where they enter the oven.

A little gas or vapor, or hydrocarbon-fluid, may be introduced by one pipe for a short time, after the kiln is elsewhere, or in all other respects closed, and then this last aperture of the pipe be entirely shut where it touches the oven. 1

B y thus proceeding, a coke is obtained from tne aforesaid'coals which is well adapted for smelting and other and all purposes for which an intense heat is required.

Having thus described my said invention, and the manner in which the same is or may ,be carried into efiect, v

' \Vhat I claim, and desire to secure by Letters Patcutis The process, substantially as herein described, of making coke from coals, such as herein referred to.

In testimony whereof, I have signed my name to I this specification, before two subscribing witnesses.

WM. J. LYND. \Vitnesses:

WM. ARMOR, ARTHUR (J. HARRIS. 

